Pump



May 15, 1945. R. L. BEEKMAN PUMP Filed Aug. '15 1944 lrweutdr ROBERT L. BEE/(MAN,

Patented May 15, 1945 I PUMP Robert L. Beekman, Miami, Fla", assignor to 0. Roy Miller, MiamL Fla.

Application August 15, 1944, Serial No. 549,609

a 3 Claims. (01.230-172) This invention relates to a pump and more particularly to a pump for the passage of fluid such as air, to a diver or the like.

A particular object of this invention is the 'provision of an improved, simplified pump construction embodying a comparative minimum of movstruction, exceptionally reliable and efficient in operation, relatively simple and inexpensive to .manufacture, and which may be readily assembled and disassembled for cleaning and repair v should the necessity arise.

Other objects will in Part be obvious and in part be pointed out as the description of the invention proceeds and disclosed in the accompanying drawing, wherein there is shown a preferred embodiment of this inventive concept.

In the drawing:

Figure 1 is a side elevational view of one form of pump embodying this inventive concept.

Figure 2 is an enlarged top elevatlonal view of one element of this invention, and

Figure 3 is an enlarged sectional view, certain parts thereof being broken away, taken through oneof the pump cylinders disclosing various constructional details forming a part of this inventive concept.

Like reference numerals refer to like parts throughout the several views of the drawing,

Having reference now to the drawing, there is generally indicated at ID a pump comprised of a base ll having projecting lugs l2 thereon to which are secured as by pivots l3, pump cylinders 14 provided with covers l5, through suitable apertures in which extend piston rods l6 secured at their lower extremities to pistons 11 positioned within cylinders l4.

The upper ends of piston rods l6 are pivotally secured as by pivots l8 to a cross member l9 pivotally secured as by a pivot to a standard 2! projecting upwardly from base II. A handle 22 is secured to cross arm ill for oscillatorymotion, and it will thus be seen that movement of the handle backward and forward about an are indicated by the arrow in Figure 1, will cause alternate reciprocatory motion of piston rods l6 and their associated pistons l1 within their related cylinders l4. 1

Having particular reference now 'to the piston cylinders generally indicated at M, it will be seen that each is comprised of a base 25, a cylinder wall 24 and a top I5. Base 25 is comprised of I a relatively large circular portion 26 provided with an interiorly disposed recess 21 extendin through the upper wall thereof and threaded as at 28 to engage the cooperating threads 29 about the lower end of cylinder wall 24.

Extending from enlarged circular portion 26 are two diametrically opposed projections and 36, providing seats for the inlet and outlet valves, respectively, of the pump, as will be more. fully pointed out hereinafter. A horizontal bore 31 drilled longitudinally through projections 35 and 36 and extending through recess 21 is threaded at its opposite end as indicated at38 and 39 and provided with closure plugs 40 and 4| threadedly engaging threads 38 and 39, respectively. It will be seen that bore 31 facilitates access to the interior of the pump for cleaning as may be necessary, as well as providing a structure which may be readily machined in manufacture.

Projection 35 has an aperture drilled through the lower face thereof, the interior of which is threaded as at in which a fitting 4B is adapted to be threadedly engaged. Fitting 46 provides a a concave depression 41 therein immediately above valve 41 to preclude possible sticking of the valve.

Projection 36 is provided with an upwardly,

extending flange 50 within which is cut an aperture 5| and on the outer surface of which is formed a valve seat 52 to accommodate an out let valve 53, adapted to be raised on the downstroke of piston I1, it being noted that such down-stroke simultaneously closes valve 41. A concave depression 54 is formed in the lower face of projection 36 adjacent the lower endof valve 53, for a purpose similar to that of depression 41.

The upper end of flange 50 is threaded as at 55 to provide for the threaded engagement of a fitting 56 suitably provided with interior threads 51 adapted for the engagement of an air hose .58 (see Figure 1'). The lower face of the base plate is provided with a projection 50 centrally disposed with respect thereto and having an aperture 6| transversely passed therethrough to accommodate pivot l3.

From the foregoing the operation of the pump should be readily understandable. Thus it will be seen that there is herein provided an improved, simplified pump structure embodying particularly a base plate comprised of a substantially unitary casting which may be readily and simply manufactured and assembled, wherein the parts, for example, valves 53 and 41, may be standardized and made interchangeable, and which will be efficient and reliable in operation, durable in construction, and relatively simple and easy to clean.

It will also be seen that there is herein provided a device accomplishing all the objects of this in- 2. In a device of the character described, in combination, a unitary base plate, comprised of a relatively large circular central portion having an aperture through the upper face thereof, and diametrically opposed projections extending from said central portion, means forming a transverse bore extending through said central portion in alignment through said projections and opening into said aperture, closure plugs for the ends of said bore, means forming inlet and outlet valve seats inthe opposite ends of said bore, inlet and vention and others including many advantages of r great practical utility and commercial impor tance.

As many embodiments may be made of this inventive concept and as many modifications. may be made in the embodiment hereinbefore shown and described, it is to be understood that all matter herein is to be interpreted merely as illustrative and not in a limiting sense.

I claim:

1. In a device of the character described, in combination, a unitary base plate, comprised of a relatively large circular central portion having an aperture through the upper face thereof, threads about said aperture, and diametrically opposed projections extending from said central portion, means forming a transverse bore extending through said central portion in alignment through said projections and opening into said aperture, threads formed internally of the ends of said bore, threaded plugs engaging said threaded ends, means forming valve seats in the O posite ends of said bore, valves associated with said seats, a pump cylinder threadedly engaged in said aperture, and a pump piston in said cylinder.

outlet valves associated with said seats, a pump cylinder seated in said aperture, a pump piston in said cylinder, and means exterior of said cylinder for actuating said pump.

3. In a device of the character described, in combination, a unitary base plate, comprised of a relatively large circular central portion having an aperture through the upper face thereof, threads about said aperture, and diametrically opposed projections extending from said'central portion, means forming a transverse bore extending through said central portion in alignment through said projections and opening into said aperture, threads formed internally of the ends of said bore, threaded plugs engaging said threaded ends, means forming an inlet valve seat in one of said projections, an inlet valve in said valve seat, means in the opposite one of said projections, and integral therewith forming an outlet valve seat, an outlet valve in said outlet valve seat, a pump cylinder threadedly engaged in said aperture, a pump piston in said cylinder, and

piston.

ROBERT L. BEEKMAN. 

